Was the Australopithecus afarensis a hoax

Please give source or somewhere I can go for further reading.

There are three major possibilities:
1) you confused Lucy with Piltdown man which was a hoax and had been suspected as such until radiomentric data confirmed it;
2) your history teacher was similarly mistaken; and
3) your history teacher was lying.

I have a better idea. Give a source to whatever gave you this strange idea in the first place.

Edit - If your history teacher told you that, and you have not been able to verify it (as you will not be able to) you should tell your history teacher you thought his/her statement was interesting and ask for a source. The downside of this approach is that you will embarrass your teacher and you may be failed. Of course a decent teacher would reward your curiosity and diligence, but I don't think that you have one of those.

Australopithecus afarensis is one of the longest-lived and best-known early human species—paleoanthropologists have uncovered remains from more than 300 individuals! Found between 3.85 and 2.95 million years ago in Eastern Africa (Ethiopia, Kenya, Tanzania), this species survived for more than 900,000 years, which is over four times as long as our own species has been around. It is best known from the sites of Hadar, Ethiopia (‘Lucy’, AL 288-1 and the 'First Family', AL 333); Dikika, Ethiopia (Dikika ‘child’ skeleton); and Laetoli (fossils of this species plus the oldest documented bipedal footprint trails). It is certainly not a bag of bones, my source is the smithsonian Institute cant get much better than that

Lies.